title: Nighttime sugar starvation orchestrates gibberellin biosynthesis and plant growth in Arabidopsis.
abstract: A plant's eventual size depends on the integration of its genetic program with environmental cues, which vary on a daily basis. Both efficient carbon metabolism and the plant hormone gibberellin are required to guarantee optimal plant growth. Yet, little is known about the interplay between carbon metabolism and gibberellins that modulates plant growth. Here, we show that sugar starvation in Arabidopsis thaliana arising from inefficient starch metabolism at night strongly reduces the expression of ent-kaurene synthase, a key regulatory enzyme for gibberellin synthesis, the following day. Our results demonstrate that plants integrate the efficiency of photosynthesis over a period of days, which is transduced into a daily rate of gibberellin biosynthesis. This enables a plant to grow to a size that is compatible with its environment.
authors.affiliation: PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Ana, Pisa 56127, Italy.
authors.forename: Eleonora
authors.initials: E
authors.lastname: Paparelli
authors.forename: Sandro
authors.initials: S
authors.lastname: Parlanti
authors.forename: Silvia
authors.initials: S
authors.lastname: Gonzali
authors.forename: Giacomo
authors.initials: G
authors.lastname: Novi
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Mariotti
authors.forename: Nello
authors.initials: N
authors.lastname: Ceccarelli
authors.forename: Joost T
authors.initials: JT
authors.lastname: van Dongen
authors.forename: Katharina
authors.initials: K
authors.lastname: Kölling
authors.forename: Samuel C
authors.initials: SC
authors.lastname: Zeeman
authors.forename: Pierdomenico
authors.initials: P
authors.lastname: Perata
mesh_terms: D019883:Alkyl and Aryl Transferases / Q000378:metabolism; D017360:Arabidopsis / Q000235:genetics / Q000254:growth & development* / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000378:metabolism; D050260:Carbohydrate Metabolism; D003624:Darkness; D055785:Gene Knockdown Techniques; D005875:Gibberellins / Q000096:biosynthesis*; D017440:Photoperiod; D010788:Photosynthesis; D010937:Plant Growth Regulators / Q000096:biosynthesis; D030821:Plants, Genetically Modified / Q000254:growth & development / Q000378:metabolism; D013213:Starch / Q000378:metabolism
chemical_list: D029681:Arabidopsis Proteins; D005875:Gibberellins; D010937:Plant Growth Regulators; D013213:Starch; D019883:Alkyl and Aryl Transferases; C105712:ent-kaurene synthetase B